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The radius of curvature of a loop-the-loop for a roller coaster is 11.8 m. At the top of the loop, the force that the seat exerts on a passenger of mass m is 0.25mg. Find the speed of the roller coaster at the top of the loop.
An object with a charge of 0.980 µC is placed at the center of a regular icosahedron with 20 equivalent surfaces. What is the electric flux through one surface of the icosahedron?
To make a simple microscope a student places two converging lenses of +20 D at opposite ends of a 34 cm long tube. What is the tube length of the microscope
Fraternal twins Jack and Jill are sent in two different ships to fetch water from the planet Kusbane that is 20 lightyears away. Which twin is older
Two charged plates create a potential difference of 190 V. At a point halfway between the plates an electron is released from rest. What was the initial speed and direction of the proton
Jack and Jim are resting on an offshore raft after a swim. They estimate that the horizontal distance between a trough, Calculate how fast the waves are moving
A hydrogen atom is in the 5d state. What is the magnitude of its orbital angular momentum
a 4.6kg sphere made of metal whose density is 3800kg/m^3, is suspended by a cord. What fraction of the volume of the sphere is submerged
A child's toy consists of a piece of plastic attached to a spring. The spring is compressed against the floor a distance of 2.0 cm and released. If the spring constant is 85 N/m, what is the magnitude of spring force acting on the toy at the moment i..
A high-pressure gas cylinder contains 50.0 L of toxic gas at a pressure of 1.80 ? 107 N/m2 and a temperature of 23.0°C. What is the final pressure if one-tenth of the gas escapes
One of your friends pulls on a rope with 3 units of force and other pulls on a second rope with 5 units of force, How hard and what direction must you pull
A jogger jogs around a circular track with the diameter of 325 m in 16 minutes. What was the jogger's average speed in m/s.
Block A has a mass of 2 kg and rests on a smooth table. What is the acceleration in m/s2 of the two blocks
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